// import fetch from 'dva/fetch';
import { notification } from 'antd';
import { routerRedux } from 'dva/router';
import store from '../index';
import { getCookie } from '../utils/utils';

const URLSearchParams = require('url-search-params');

const codeMessage = {
  200: '服务器成功返回请求的数据。',
  201: '新建或修改数据成功。',
  202: '一个请求已经进入后台排队（异步任务）。',
  204: '删除数据成功。',
  400: '发出的请求有错误，服务器没有进行新建或修改数据的操作。',
  401: '用户没有权限（令牌、用户名、密码错误）。',
  403: '用户得到授权，但是访问是被禁止的。',
  404: '发出的请求针对的是不存在的记录，服务器没有进行操作。',
  406: '请求的格式不可得。',
  410: '请求的资源被永久删除，且不会再得到的。',
  422: '当创建一个对象时，发生一个验证错误。',
  500: '服务器发生错误，请检查服务器。',
  502: '网关错误。',
  503: '服务不可用，服务器暂时过载或维护。',
  504: '网关超时。',
};

function checkStatus(response) {
  if (response.status >= 200 && response.status < 300) {
    return response;
  }
  const errortext = codeMessage[response.status] || response.statusText;
  notification.error({
    message: `请求错误 ${response.status}: ${response.url}`,
    description: errortext,
  });
  const error = new Error(errortext);
  error.name = response.status;
  error.response = response;
  throw error;
}

// common function
function buildUrlFunc(url, data) {
  const _url = [];
  if (data) {
    Object.keys(data).map(key => {
      _url.push(`${key}=${data[key]}`);
    });
  }
  if (_url && _url.length) {
    url = `${url}?${_url.join('&')}`;
  }
  return url;
}

export default function request(url, data, method) {
  if (!method) {
    method = 'POST';
  }
  const adminToken = getCookie('adminToken');
  const htk = adminToken ? { adminToken } : {};
  const token = localStorage.getItem('admintoken');

  const payload = {
    method: method,
    headers: {
      'Content-Type': 'application/json;charset=utf-8',
      Authorization: `Bearer ${token}`,
      ...htk,
    },
  };

  // method
  if (method === 'GET') {
    url = buildUrlFunc(url, data);
  } else if (method === 'DELETE' || method === 'PUT') {
    url = buildUrlFunc(url, data);
    payload.body = JSON.stringify(data);
  } else if (method === 'PUT2') {
    payload.body = JSON.stringify(data);
    payload.method = 'PUT';
  } else if (method === 'POST2') {
    url = buildUrlFunc(url, data);
    payload.method = 'POST';
    payload.body = JSON.stringify(data);
  } else {
    if (data.pageNum) {
      url += `?pageNum=${data.pageNum}`;
    }
    if (data.pageSize) {
      url += `&pageSize=${data.pageSize}`;
    }
    payload.body = JSON.stringify(data);
  }

  return window
    .fetch(url, payload)
    .then(res => {
      return res.json();
    })
    .catch(e => {
      const { dispatch } = store;
      const status = e.name;
      if (status === 401) {
        dispatch({
          type: 'login/logout',
        });
        return;
      }
      if (status === 403) {
        dispatch(routerRedux.push('/exception/403'));
        return {};
      }
      if (status <= 504 && status >= 500) {
        dispatch(routerRedux.push('/exception/500'));
        return {};
      }
      if (status >= 404 && status < 422) {
        dispatch({
          type: 'login/logout',
        });
      }
    });
}
